Juspay Technologies Interview Questions, Process, and Tips

Q1. Guesstimates , Product Metric etc
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Q2. Resume Overview
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A problem will be given and you have to edit the code to change functionality

Q1. Puzzles and aptitude
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Q2. Minimum number of races to find the fastest of 25 horses
Ans. 
The minimum number of races needed to find the fastest of 25 horses is 5.
• Divide the 25 horses into 5 groups of 5 horses each.

• Conduct 5 races with each group to determine the fastest horse in each group.

• Then conduct a final race with the winners from each group to find the fastest horse overall.
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Testing related MCQs

Q1. Customer api creation in postman
Ans. 
Creating customer API in Postman for testing purposes
• Use Postman to create a new request with the necessary endpoint and parameters

• Set up authentication if required for the API

• Add headers, body, and any other necessary information for the request

• Test the API request to ensure it is functioning correctly

• Save the request in a collection for future testing
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Q2. Writing test cases for customer paying more payments to same order.
Ans. 
Write test cases for customer paying more payments to same order
• Verify that the system allows the customer to make multiple payments towards the same order

• Check that the total amount paid by the customer is correctly updated for the order

• Ensure that the payment history for the order reflects all payments made by the customer
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Q3. Observing the UIs and giving suggestions and also test cases
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This round has 3 coding questions mostly based on graph and trees

Q1. A lockable tree problem
Ans. 
Design a data structure for locking/unlocking nodes in a binary tree efficiently.
• Implement a lockable tree data structure with lock(), unlock(), and isLocked() methods.

• Ensure a node can only be locked if all ancestors are unlocked and all descendants are locked.

• Optimize the operations for efficiency.

• Consider using a flag in each node to track its locked status.

• Use a recursive approach to check locking conditions.

• Mainta...read more
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Q2. OS level improvements in above problem
Ans. 
Improving the operating system can enhance performance and efficiency of the system.
• Optimizing memory management to reduce overhead

• Implementing better scheduling algorithms to improve multitasking

• Enhancing file system performance for faster data access

• Improving network stack for better communication speed
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First round is apti when in placement

Too hard all are dsa questions

30 question -30 min,topics - profit or loss , time work distance ,time speed ,upstreaam downstream percentage ,probability

2 dsa questions were asked related to graph

Test on hackerearth binary tree

Q1. Project related
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Q2. 1 dsa question were asked
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